Hansen, Frederik Lundgaard, et al. “Bilateral Elastofibroma Dorsi As Differential Diagnosis in Posterior Chest Wall Tumor: A Case Report”. Archives of Clinical and Medical Case Reports, vol. 4, no. 2, Mar. 2020, pp. 235-8, https://fortunejournals.org/ojs/index.php/acmcr/article/view/22304.